Grain-drill tooth



(No Model.)

A. su A. FRANKLIN. Grain Drill Teethv No. 230,184. Pa'fcented J'uly 280, 1880.

W' neeszse/ v A fizvenw 97% v Mygs;

N.PETERS. FHOTGLITHOBRAFHER. WASMNGTGN. D C.

UNITED STATES PATENT OrrIcEo ALBERT FRANKLIN AND ALVIN FRANKLIN, OF WESTERVILLE, OHIO.

GRAIN-DRILL TOOTH.

SPECIFICATION forming part of Letters Patent No. 230,184, dated July 20, 1880.

Application filed May 31, 1880. (No model.)

To all whom fit may concern.'

Be it known that we, ALBERT FRANKLTN and ALVIN FRANKLIN, citizens of the United States, residing at Westerville, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Grain- Drill Teeth and we do hereby declare the following to be a full, clear, and exact description ofthe invention, such as willenable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention has for its objectl to provide a means whereby there will be automatically supplied wooden fastenings for holding the drill-hoe 5 and it consists in the construction and arrangement of the several parts hereinafter explained, and pointed outin the claims.

In the drawings, Figure lis a side elevation. Fig. 2 is a plan, and Figure 3is a vertcallongitudinal section.

c is the arm or drag-bar, one end of which is attached to the sulky-fraine, while on its opposite or rear end is pivoted the drill-110e a. To the drill-hoe is fitted a short retaining-arm, b, which extends forward immediately under fthe drill-arm a, and is furnished with a shoulder, b', against which abuts one end of a coilspring, b2. The coil-spring is'wound around the retaining-arm, and has its rear end, b3, xed to the drill-arm a, so that it operates to hold the drill-hoe in the proper position for drilling seed, as shown in the drawings. The spring is intended to hold the drill-hoe rigid in position when the machine is in use, but has sufiicient power to retract the hoe when its point has been forced to the rear out of line by contact with an obstruction.

The forward end of ythe retaining-arm b is pivoted to the lower wing, c', of a bell-crank lever, c, which is pivoted between two lugs, c2, formed, by preference, on a base-board, d, which is fastened on the upper side ot' the drill-arm c. The wing c passes down through a mortise in the board d, and through a inortise, c2, in the arm c. The lever c is provided with a shoulder, c3, which abnts against a stop, d', on the rear end of the board d, and

is thereby prevented from turning backward. The upper wing, c2, of the lever c is extended forward, and is provided with a knife-edge, c, and with a tlan ge,c, arranged to forni a notch, c5, between it and the edge c3. v

cG is a set'screw put through the flange c4. The head c7 ofthe lever c is curved backward from the knife c3, and is extended upward in a long wing, o8. The head c7 will pass down into the mortise a?, and the wingc8 serves as a guide to prevent itfrom catching on the arm a or on the board d, and to aid in its easy return into its position, above shown. O11 the forward end of the board d, I form a small chamber, d2, closed by a cap, d3, and in which I place a small follower, d4, which is actuated by a spring, d5, which is held in place by a stem, (17, fixed to the follower and passing through a bearingin the rear end of the chamber. The forward end of the chamber is open,

so that a pin-block, e, will slide readilythrough it and under the knife c3 on the lever c. The pin-block e is made of light material, and just wide enough to reach across and rest on the board d on opposite sides of the niortise a2. It is slightly grooved on its upper surface, as shown in Fig. 3, so that the knife-blade c3 will more readily cut through it. On the sides of the head of the lever c, just above the knifeblade c3, I form recesses f, which receive the broken ends of the retaining-pin and carry them down through the mortise c2. Without such recesses the mortise c2 would have to be made wider than otherwise necessary.

The pin-block c is placed in the chamber (P so that the follower Z4 presses againstit. The edge of the pin-block is pressed outward and under the knife c3 and against the end of the set-screw c6.

When the machine is started and the point of the drill-hoe enters the ground the force exerted causes the knife c3 to cut through and split off a small section, g, of the block e. The cut-off section is heldin the notch c5, and serves as the pin to hold the drill-hoe in place. When the drill-hoe strikes an obstruction and its point is turned back the force exerted operates on the lever c, which breaks the pin g, and the head c'I turns down through the mortise a2, carrying the broken pin with it. As

IOO

soon as the hoe is released the spring b2 throws the several parts back into the position shown in Fig. 1, and the spring l5 pushes the edge of the block c under the knife, and another pin is thus automaticallyprovided. By means of the set-screw cG the size and strength ot' the pin y can be fully and easily regulated.

The set of the drill-hoe a may be changed by means of a series of holes formed in the wing` c of the lever c, as shown.

By this construction there is provided an automatic means for immediately providing1 al new pin in place of the broken one, thereby saving the annoyance and delay attendi ng the ordinary methods.

rlhe spring,1 b2 is employed to give an automatic action in returning the hoe to its place after the breaking,` of a retaining-pin. The return could be made by the hand, but we prefer the automatic action hereinbefore described. The lever c. with its board d, the follower d4, and its spring' (15, can all be constructed together, so that they can be fastened to the drill-frame in machines where the arm a is not employed. The connecting-bar I) would, in such cases, have a slight vertical movement on its pivotal fasteniixgs. The application of the device to such machines requires but slight skill.

The automatic feeding,I of the block e could be dispensed with and the block be fed by hand, or separate pins could be provided and inserted in the notch c5 by the hand'; but we prefer to have the entire mechanism operated automatically, as described.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is

1. In a drill, a cutting-lever pivotcd to the drill-frame and connected by bar or lilik with the drill-hoe, and provided with a knife or cutting-edge adapted to automatically cut a retaining-pin from a block of wood prepared for the purpose and hold it, substantially as set forth.

2. An automatic device for cutting retaining-pins for drill-hoes, consisting of the lever c, provided with a blade, c3, flange c, and setscrew c6, combined with the drag-bar of a grain-drill, substantially as set forth.

3. In an automatic device for cutting retaining-pins for drill-hoes, the follower d4 and spring' d5, arranged in a chamber formed on the base-board d, in frontof the cutting-lever, substantially as set forth.

4. In combination with the drag-bar of a grain-drill, the follower d, spring` d5, with its inclosingchamber, and lever c, with blade c, substantially as described.

In testimony that we claim the `foregoing we have hereunto set our hands this 29th day of April, 1880.

ALBERT FRANKLIN. ALVIN FRANKLIN.

Witnesses:

M. (JLossoN, RALPH SMITH. 

